准线 meaning in English

neat line (墙面); [数学] directrix; alignment

A quasilinear equation is one in which the highest-order derivative appears linearly .
最高阶导数线性地出现的那种方程是准线性方程。
Constructing directrix for conic curve
圆锥曲线准线的几何作图
Levelling control at two axis with crosshair display
自动找平控制器带十字准线显示器的两轴找平控制
Correct the wheel alignment on a car
修正汽车上的轮胎准线
Quasilinear plasma theory
准线性等离子体理论

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